Yes, that is possible. what you need to do is create your DataTemplate for the Maximized view. When in the Maximized state, you could bind the rest of the "contact's" data to the DataTemplate. For instance, here is a rough wire-frame:
Large state> the DataTemplate has an image control along with several textBlocks to hold all the contact's info
Normal state> the DataTemplate contains no image but the contact's phone number and other info
Small state> the DataTemplate only has a single textBlock to show the contact's name
The tile item is still bound to the same contact, but displays different amount of info depending on its size. The FluidContentState converter would then switch to the proper view and display the data via the DataTemplate.
To see this in action, go to the demo application by clicking here.
You can glimpse the code right there by switching to "code view" by toggling the button at the top right of the window. To dig deeper, you have the entire example application on your machine. If you installed the controls at the default location, you will find the solution at this location:
C:\Program Files (x86)\Telerik\RadControls for Silverlight Q2 2012\Demos
Open the ExamplesCS_SL.sln
file in VS2010 and locate the TileView project. The demo is in there.